As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO STL. FLIGHT CREW REPORTED THAT DURING CRUISE AT FL 350 THEY LOST #2 ENGINE EPR AND N1 DEGRADED MESSAGE OCCURED. CREW ACCOMPLISHED QRH PROCEDURES AND THE AIRCRFT LANDED SAFELY AT STL WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE P2/T2 PROBE PER TASK CARD 26L40073005.